xdf补充材料语法第171题

The expected rise in the price of oil could be a serious impact to industrialized nations and severely dimish the possibility to have an economy free of inflation.

A. be a serious impact to industrialized nations and severely diminish the possibility to have

B. seriously impact on industrialized nations and severely impede the possibility to have

C. seriously impact on industrialized nations and severely impede the possibility of having

D.  have a serious impact on industrialized nations and severely impede the possibility to have

E. have a serious impact on industrialized nations and severely diminish the possibility of having

答案：E. 我选 C. 为什么？

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=23003

看了半天，还是不太明白。最后大家也没讨论出个结果。

有没有nn在帮忙指点一下？